Emu XL-7 & MP-7 User's Group

I have a Virus B synthesiser and an Akai S2000 Sampler. I want to be 
able to do the following by using the XL-7, and was wondering what is 
possible. My questions are coming from a live performance 
perspective, where I use an XL-7 as the master controller to sequence 
my synth and sampler. 

Questions:

1) Is it possible to use some of the Track Enable/Mute buttons to 
send a looped sequence of midi notes out the XL-7 MIDI Out A and/or B 
to the synth or sampler? 

2) Is it possible to use the Keypads to trigger the synth or sampler 
like you would with a MIDI keyboard. (Mainly to play Samples on the 
fly)

3) Is it it possible to use the trigger functionality to trigger a 
sequence of notes (instead of one note) to send out the XL-7 MIDI Out 
A and B.

4) Is it possible to change a Track for a Pattern in real-time 
without having to stop the performance. i.e. Change a loop for a 
track while continuing to play live. Or at the very least change the 
entire Pattern so that long live sessions are possible.

Glenn
glennvassallo@...